This is the Team Orion Vortex Experience 40A ESC and Brushless Motor Combo.

FEATURES: Ideal performance upgrade for brushless powered RTR surfers.

Sensorless brushless motor design with aluminum alloy anodized front and back plates.
Genuine carbon fiber center barrel in motor creates a tuned magnetic field.
Forward and reverse electronic speed control with auto transmitter recognition and setup (no setup button needed).

INCLUDES: Vortex Experience Motor with Connectors #ORI28170
Vortex Experience SL 40A ESC with Tamiya style battery plug and three gold motor connectors #ORI65005
Instruction sheet REQUIRES: Installing in vehicle and connecting to battery and receiver SPECS: Motor- Resistance:0.021 Ohm Current Draw: 2.1A Turns: 14 Kv Rating: 2990 RPM/V Max Efficiency: 84.9% @ 27.7A (185W) Max Continuous Current: 30A Max Current: 60A (efficiency 80% = 3800W ESC- Input Voltage: 6-cell NiCd/NiMH, 2-cell LiPo Maximum Continuous Current: 40 amp water-cooled.
Weight: 1.5oz (42g) Length: 1.3" (34mm) Width: 2.4" (20mm) Height: 0.24" (6mm) without fan Anti cogging SLD (super linear drive) throttle control